Reinforced concrete manhole-cover.



J. P. ROGERS.

nnmrononn CONCRETE MANHOLE covnn.

Patented Jan. 5, 1909.

vAIPLIOA'I'IOIT FILED APR. 16, 1908.

Inventor STATES PATENT OFFICE. Joan men, I

I Specification of Letters Patent,

j Patented ran. a, 1909.

To all whom it may camera: 1

-Be it known that I, JOHN P. R G S,

. citizen of the United States, residin Topeka, in the county of Shawnee and tate of Kansas, haveinvented a new and useful Improvement in Reinforced Concrete Man-- hole-Covers, of which' the following is a specification. a

' My invention relates to the coverings for man-holes for sewers, telephone and" telegraph conduits, steam-pipe conduits,'and all under ound passages requiring manholes, an as well openings for coal-holes,

' cellars, and the like.

The object of my invention is to do away with the usual heavy metal castings heretofore used for such ur oses and weighing, usually, several hun re pounds, and to substitute therefor a; skeleton metal frame-work 01E economical construction and light weight and suitable as the reinforcement- -for concrete", of which the. ma'inbodyof the struc ture is to be built. g It consists primarily work collar, a metal base portion, and a metal rim;.an'd it also consists of the parts,.

improvements, and combinations "hereins after pointed out and claimed.

' description- In the drawings accompanyingand forming' partof this specification, and in the 'thereof,'-I have shown my invention in its preferred form, and '1 have 'shown the'best mode of applying the prin ciples thereof; but it is to be understood that my invention is not confined to the "exact... details shown in thedrawings .and inthede v scription of the'drawings, and that I contemplate changes "in form, proportions, and

the substitution of equivalent materials;

arts,

members, and the; transposition of l withincthe scope ofithe a-ppended c aims,

" without departmg from the spiritof. the

' invention.

51in view, of amamhole' Figure '1-is a I 4 cover 'made 1n accordance with the: principlesof my inventionand comprising both the framework forv the man-hole opening and the removable cover proper, the right half of the view showingthe' concrete applied to the-framework, and the left ha f showing the skeleton metal frame. Fig. 2

Y is a sectional View of'the structure shown in Fig. 1 taken on a through the center, e removable cover elevated; 1 3, 4, 5, and 6, are

of a metal lattice:

lane approximately v enlarged sectionaliliews of the rim for the base ortio'n', a modified form of said rim,

Iusean open or lattice-work metal. 7

the base portion I use a metal portion, preferably also expanded metal, 8';-parts 7 and 8jjmay be'either integral. with each other .or separate. Mounted on' the collar 7 isal metal rim 9-having an annularchannel 10in its under side-for receiving *the ,upper edge of the collar 7. Concrete 11', is to be filled in on both sides of the co lar and base portions 7 and 8', the shape, being made by means of templets. To 'protect the outer edge ofthe base portion,,the angle iron 12 may beused; or a channel-iron'13 may used to protect also the upper edge.

I The mm 9 has the removable cover 1,5. The cover; may be 'madelwith an outer protecting rim or shield 16, which'ma "the .rim 9.

suitablereinforcement, 17, and. the cover may thenibe filled with concrete 19, as inch- .cated. For ventilating holes, I prefer to users. number of short pipes, each with its lower portion smaller than its upper port on so-astOform a shoulder which may rest on the Johnson bar rods and thus be held firmly a step or ledge 14 toreceive .be step edto-correspond to 11 'one' o the steps or ledges may be laid the Johnson barrods, or other in'place, these pipes being'indieated by the numeral 18.

It has been the practice heretofore to constructthe man-ho e openin ofcast metal,

which ,weighs several hun red pounds for,

each one. .They are therefore very heavy for handling, while .in' the matter of ship-.

- -Wi th m invention, 'howlate that t e skeleton frame liandl'ed on account of its'light weight and convenient form.

vw'ork is provided, I prefer to spread a. paper over the top of the walls ofthe man-hole,

the .cost of transportation is a conbethushandled and shipped,

To construct the cover when the frame v then set the rim 12 inlace thereon, then fill in the required dept of concrete,-then "set the base portion8 and the collar 7 andthe rim 9 in place, then, using av templet or v templets, fill in the remaining concrete this work being done at the man-hole, and usually with materials already there.

What I claim is: a

a 1. A metal frame-work fora reinfo ced concrete manhole cover, comprising a etal lattice-work-collar portion, a metal base portion, and as set to h. v

2'. A metal frame-work for a reinforcedconcrete manhole cover, comprising a metal "lattice-work collarportion, a metal latticework base porti on, and a separate metal superposed rim fon supporting a removable cover.v

3. Ametal frame-work concrete manhole cover, comprising an expanded-metal collar portion, an expandedmetal base; portion, and a separate metal superposed mm for supporting a removable cover, said rim having an annular channel in its under side to receive the collar portion:

for a reinforced 4. A metal frame-work fora reinforced concrete manhole cover, comprising a metal lattice-.work-collar portion, a metal latticework base portion, and a separate metal superposed rim having a channel in its underside to receive the collar portion.

' 5. A metal frame-work for, a reinforced concrete manhole cover, comprising expanded-metal collar and base portions, a protecting rim around the outer edge of the ases-portion, and a separate superposed rim for supporting a removable cover and havin a channel mits underside to receive the 40/00 ar portion.

6. The combination of expanded metal collar. and base portions, a' metal'su erposed I v rim, concreteforming'the'main bo y of the separate metal rim, substantlally',

eoasoa collarand base 'on' both sides of 'the expanded metal, and a removable;cover supported on said rim. 4

7. The combinat'on of expanded metal collar and base portions, :1 superposed metal rim-concrete formin the main body of the collar and base on both sides of the expanded metal, a metal protecting rim around the outer edge of thebase, a'removable cover supported on the superposed rim and comprising an outer metal protecting mm, a metal reinforcement, and concrete on both sides of the reinforcement and forming the mainbody of the said removable cover.

8. ,A removablecover for man-holes, compnsm a metal outer protecting r1m,a serles of J o nson bar rods supportedthereon, a

series ofpipes extending through said cover metal protecting rim, a metal reinforcement,

and concreteon both sides of the reinforcement and forming the main body oi the cover.

10. -In a manhole collar and cover, the combination of a metal base portion, a metal lattice-work collar portion,, con crete form'- ing the main body of the collar and base on .both sides of said 'metal portions, and ametal superposed rim.

, In testimony whereof I have hereunto signed my name in the presence-of witnesses.

. Witnesses: W, F. So ocH, 1 -'.1-1 L D. Rrcmnnson.

oth sides" of theex- 7 JOHN 'P. ROGERS.' 1 

